I received my Slice machine a couple days ago and have had some time to play. I have to say that I do love it, and it is worth the money that I paid for it ($49.99 at Joanns). It works wonderfully right out of the box (except circles). The glass cutting mat is great too. I love the design cards that I have so far: Basics 1 (comes with the machine), Vintage Findings, & Faith. I have one more, Basics 2, coming soon. The designs are wonderful silhouette type designs, and are not overly cutesy.
However, the Slice will not replace my Cricuts. I love being able to cut larger sizes, large quantities, set up cutting files with my gypsy or DS, and grouping cuts.